Here no dimensions are mentioned, but in other stores I found: "Inside dimensions: 180x210x120 mm" The combination of EOS 40D + TAMRON 18-270 VC with attached lens hood attaches to the depths nearly 21 cm. So, would lt. To the dimensions of two other reputable senders fit. Now comes the pocket and has the following internal dimensions: 140x160x110 mm (length x depth x width). So the 40D with the Tamron 18-270 fits unfortunately only with dismounted lens hood in the pocket and then scrapes the zipper on the body. Otherwise, this bag would be the ideal holiday light bag for the ideal holiday combination of the 40D and the Tamron 18-270. What a pity !!